Device for drawing off artificial fibers from the spinneret, especially fibers spun from the molten mass



Apnl 29, 1952 J. ZMATLIK ETAL 2,595,044

DEVICE FoR DRAWING 0FF ARTIFICIAL FIBERS FROM THE SPINNERET, ESPECIALLY FIBERS SPUN FROM THE MOLTEN MASS Filed June 1, 1949 Patented Apr. 2 9, 1952 V UNITED STATES PATENT OFFICE DEVIGE' FOR DRAWING OFF ARTIFICIAL FIBERS FROM THE SPINNERET, ESPEA. CIALLY. FIBERS SPUN FROMTHEMOLTEN;

MASS.

Czechoslovakia.

ApplicationJune 1', 1949, Serial No. 96,592 In Czechoslovakia J-unel, 1948 1'7 Claims,

Fibers which arespunfrom. themolten mass. e. g. polyamide fibers, areusually drawn. off from the spinneret by. means of ametalcylinden, Said cylinder has a. rather great diameter andaconsiderable weight in. order to. cool instantaneously the fiber which is, after'having left .thespinneret, still in a plastic condition. Thefiber. or the. fiber bundle has to. be wound. several times'round the, drawing off cylinder in. order to obtainthe. e sary friction. This. is rather difilcult, to; do at high spinning speeds. The design and. the material of such a high speed. heavy rotatory cylinder. must be chosen very. carefully.

The device according to thepresent invention consists of two vertical rows of cylinders, placed under the spinneret ina. mutually staggered position which rows may bev removedfrom each other or tightly approached, all. of. the. said. cylinders rotating with. the same speedandinopposite direction in each. row so that the fibers. may fall freely from the spinneret,.between distancedcylinder rows,.being on. the contrary caught, when the saidcylinder rows. are closely approached, and drawn forcibly in a. wave-like line from the spinneret. The cylindersvof, onerow'may be-provided with an elastic surface of rubber; or. the-like, the cylinders of. the other. row being made of; metal; the friction is then so increased that oneof. the rows may consist only of av single rubber coated cylinder, the other row consisting of; two metal cylinders, having the samev diameter and rotating with the same speed in opposite direction re,- garding the rubber coatedcylignder; The, rubber coated cylinder is pushed between; two metal cylinders according to the-diagram; shown in Figs. 1 and 2 of the accompanyingdrawing;

Fig. 1 shows distanced cylinders before the beginning of drawin off spunfiberasaid fibers falling freely through the. gap. between the said cylinders.

In the Fig. 2 the same device isillustratedafter the cylinder rows having been; shifted. close together so that the fibersare-engaged: and forcibly. drawn in a wave-like line due to the-friction ofthe fiber on the surface of the cylinders, especially of the rubber coated one. The cylinders of each row rotatein opposite direction as shown by arrows. The known joint driving is not shown in this diagram.

A known watercooling device (not shown) may. be arranged between the-spinneretand thedrawing off device.

It has been found that; it is not. necessary to press the fiber between the cylinders, the. frictionbeing high enough, especially when using a rubber coatedcylinder in one row. The cylinders may be, accordingly shaped as shown in Fig. 3, their central part haying areduced diameter so that the cylinders of both rows are rolling on each other with their borders; only.

Above the cylinders may be arranged a known fiber shifting device for changing the place on which the fiber comes. intocontact with the cylinder in order to prevent thefiber to cut a groove into the cylinder surface. Such changing devices are'commonly. used when-winding yarn on bobbins and it is therefore not necessary to go into details. It is only to be mentioned that this changingdevice may-run very slowly.

he descriheddevice is advantageous especially when high spinning speeds'are used and in connection with preceding cooling with water or with another liquid. The winding of the fiber bundle on. the drawing, offcylinder is fully omitted because the device may be-put in action simply by means of a lever (3, Fig. 4), which is acting directly on the tension roller 4, serving for stretching the driving band or belt 5. The-diagramof the, driving arrangementis shown in Fig, ,4 where the shifting. of thecylindersis illustratedby horizontal arrows.

The shifting may be naturally arranged in; a.

relative manner sothat: only one cylinder row is horizontally shifted, the. other one. standing firmly,

We claim:

1., Apparatusfor drawing off artificia'l, moltenspun fibers from. a; spinnerethaving a. discharge opening in, its, bottom; comprising" at leastv three rotatablymounted-rollers, located below the spin neret having; substantially horizontal axes; two of said rollers being vertically'aligned andhaving their; axes positioned equal amounts above and below; respectively, of saidthirdroller; means for relatively; shifting said third roller withrespect tosaid-two other rollers in a. hori zontal directionbetween an. operativev position in which the distance between the projections of: the axes of, said-rollers in a horizontal plane is less than thesum of their radii, and aninoperativeposition in which. the distance between the projectionsof the axesof said rollers on said horizontal plane exceeds the. sum of. their radii and in which the projection: of the axis of said discharge opening on said horizontal plane is being located-between. and spaced from the projections of said rollers on saidhorizontal plane, Permitting n ring: of a moltenfiber between said rollers. by the force of gravityin inoperative: position of said rollers; and means; for

tance exceeding the diameter of the fiber, at ia.

least one of said rollers shiftable in a horizontal direction between an operative position in which the distance between the projections of the axes of said rollers on a horizontal plane is-less than the sum of their radii and an inoperative position in which the distance between the projections of the axes of said rollers on a horizon tal plane exceeds the sum of their radii and in which the projection of the axis of said discharge opening on said horizontal plane is be'- ing located between and spaced from the projections of said rollers on said horizontal plane, permitting entering of a molten fiber between said rollers by the force of gravity in inoperative position of said rollers; means for shifting said shiftable rollers to and fro between said operative and inoperative positions; and means for rotating said rollers in opposite directions, whereby when said rollers are in said operative position and rotated, they will exert on the fiber a frictional drag only without compressing it.

3. A device for drawing off artificial molten spun fibers from a spinneret having a discharge opening in its bottom, comprising at least two rotatably supported cooperating rollers arranged below the spinneret having parallel axes relatively displaced in the direction of the extension of the fiber, at least one of said rollers being shiftable between an operative position in which the distance between the projections of the axes of said rollers in a horizontal plane is less than the sum of their radii, and an inoperative position in which thedistance between the projections of the axes of said rollers on said horizontal plane exceeds the sum of their radii and in which the projection of the axis of said discharge opening on said horizontal plane is being located between and spaced from the projections of said rollers on said horizontal plane, permitting entering of a molten fiber between said rollers by the force of gravity in inoperative position of said rollers; means for rotating said rollers in opposite directions; at least one roller having at least one rim preventing the cooperating surfaces of said rollers to approach closer than a distance exceeding the diameter of the fiber; and means for shifting said shiftable roller towards and away from said other roller.

4. A device for drawing off artificial molten spun fibers from a spinneret having a discharge opening in its bottom, comprising two cooperating vertically aligned columns of rotatably supported rollers arranged below the spinneret having parallel axes, each column displaced vertically with respect to the other column, said columns being so arranged that the cooperating circumferences of adjacent rollers of different columns are permanently at a distance at least slightly exceeding the diameter of the fiber, at least one of said vertical columns shiftable in a horizontal direction between an operative position in which the projection on a horizontal plane of the distances between the axes of each pair of adjacent rollers of different columns is less than the sum of the radii of the respective adjacent rollers and an inoperative position in which the projection on a horizontal plane of the distances between the axes of each pair of adjacent rollers of different columns exceeds the sum of the radii of the respective adjacent rollers and in which the projection of the axis of said discharge opening on said horizontal plane is being located between and spaced from the projections of said rollers on said horizontal plane, permitting entering of a molten fiber between said rollers by the force of gravity in inoperative position of said rollers; means for shifting said shiftable column to and fro between said operative and said inoperative position; and

- means for rotating the rollers in said two columns in opposite directions.

5. A device for drawing on artificial molten spun fibers from a spinneret having a discharge opening in its bottom, comprising at least two rotatably supported cooperating rollers arranged below the spinneret at least part of the surface of one roller consisting of a material having a high coefiicient of friction, said rollers having horizontally extending vertically displaced axes spaced so that their cooperating surfaces are permanently at a distance exceeding the diameter of the fiber, at least one of said rollers shiftable in a horizontal direction between an operative position in which the distance between the projections of the axes of said rollers on a horizontal plane is less than the sum of their radii and an inoperative position in which the distance between the projections of the axes of said rollers on a horizontal plane exceeds the sum of their radii and in which the projection of'the axis of said discharge opening on said horizontal plane is being located between and spaced from the projections of said rollers on said horizontal plane, permitting entering of a molten fiber be tween said rollers by the force of gravity in inoperative position of said rollers; means for shifting said shiftable roller to and fro between said operative and said inoperative positions; and means for rotating said rollers in opposite directions, whereby when said rollers are in said operative position and rotated, they will exert on the fiber a frictional drag only without compressing it.

6. A device for drawing ofi artificial molten spun fibers from a spinneret having a discharge opening in its bottom, comprising at least two rotatably supported cooperating rollers arranged below the spinneret at least part of the surface of one roller consisting of rubber, said rollers having horizontally extending vertically displaced axes spaced so that their cooperating surfaces are permanently at a distance exceeding the diameter of the fiber, at least one of said rollers shiftable in a horizontal direction between an operative position in which the distance between the projections of the axes of said rollers on a horizontal plane is less than the sum of their radii and an inoperative position in which the distance between the projections of the axes of said rollers on a horizontal plane exceeds the sum of their radii and in which the projection of the axis of said discharge opening on said horizontal plane is being located between and spaced from the projections of said rollers on said horizontal plane, permitting entering of a molten fiber between said rollers by the force of gravity in inoperative position of said rollers; means for shifting said shiftable roller to and fro between said operative and said inoperative positions; and means for rotating said rollers in opposite directions, whereby when said: rollers are in saidoperativeposition and rotated, they will exert on the fiber africtional dragonly without compressing it.

7-. A device for drawingoif artificial molten spun fibers from aspinneret having a discharge openinginits bottom; comprising two cooperating ferent columns are permanently at a distance at.

leastslightly exceeding-the diameter of-the fiber,

atleast one of said vertical columns shiftableina horizontal direction between. an operative position in which the projection on ahorizontal plane of the distances between the axes of: each pair of adjacentrollersof different'columns is less than the sum of the-radii of the-respective adjacent rollers andaninoperative positionv in,

which the projection ona horizontal. plane of the distances between the-axes ofeach pair of adjacent rollers of different columns exceeds the sum of the radii: of therespective adjacentrollers and in whichithe'projectionof the axis ofsaid discharge opening on said horizontal plane is being located-between-and spaced; from the-projections of said rollers-on said horizontal plane, permitting entering of a molten fiber between said rollers by the=force ofgravity ininoperative position of said rollers; means for shifting said shiftable -column to, and fro, between said operative andsaid inoperative 1 position; and means for rotating: the rollers in said two columns in opposite-directions;

8'. A device for drawing offartificialnnolten spun fibers from a spinneret-having a discharge opening in its bottom, comprising-two cooperating vertically aligned columns of 'rotatably supported rollers arranged below-the spinneret'hav ingparallel axes, each column displaced vertically with respect to-the othercolumn, atileast part of the surface of at least one roller consisting of rubber,-said columns being so arranged that the cooperating;circumferences of adjacent rollers of different columns are permanently at a distance at least slightly exceeding the diameter of the fiber, at least one of said vertical columns shiftable in a horizontal direction between an operative position in which the projection on a horizontal plane of the distances between the axes of each pair of adjacent rollers of different columns is less'than the sum of the radii of the respective adjacent rollers and an inoperative position in which, the projection on a horizontal plane ofthe distances betweenithe axes of each pair ofadjacentrollers of different columns exceeds the sum 1 of "the radii of the respective adjacent rollers and in which the projection of the axis ofgsaiddischargeopening on said horizontal plane is being located between and spaced from the projections of said rollers on said horizontal plane, permitting entering of a molten fiber between said rollers by the force of gravity in inoperative position of said rollers; means for shifting said shiftable column to and fro between said operative and said inoperative position; and means for rotating the rollers in said two columns in opposite directions.

9. A device for drawing off artificial fibers from the spinneret, comprising at least two rotatably supported cooperating rollers'havi'ng horizontal=- ly extending vertically displaced axes spaced sothat their cooperating surfaces are-permanently at a-distance exceeding the diameterof 'thefiber; at least oneof said rollers shiftable in a horizon-- tal direction between an operative position-1nwhich the distance between theprojections of" theaxes of said rollers on a horizontal plane" is less than the sum of their radii and aninopera-- tive position in which the distance between the projections of the axes of said rollerson ahori-- zontal planeexceeds thesum of their radii; means for shifting said shi ftableroller to and fro between said operative and said. inoperative positions; an idleroller' contacting the surface of one-ofsaid cooperating rollers; a drivingbeltengaging said other cooperating roller along a. portion of its axial-extension and-said idler roller; and means fordriving said belt, whereby whensaid belt is driven the two cooperating rollers will rotate in opposite directions.

10. A devicefor drawing off artificial fibers from the spinneret, comprising. at least-two -ro tatably supported cooperating rollers having horizontally extending vertically displaced axes spaced so that their cooperating surfaces are permanently at a-distance exceeding the-diameter of the fiber, at least oneof said rollers shiftable in a horizontal direction between an operative position in which the distance-between the projections of the-axes of said-rollerson-a horizontal plane is less than the sum of their radii and an inoperative position in which the distancebetween the projections of the axes of said rollers on a horizontal plane exceeds the sum of their radii; an idle roller contactingthe surface of one of said cooperating rollers; a unwing belt engaging said other cooperating roller along a portion of its axial'length andsaid i'dle; roller; means for driving said belt; and means for 'tensioning said belt.

IL A device for drawing oif' artificial fibers; from the spinneret, comprisingat least two ro tatably supported cooperating rollershavingi horizontally extending vertically di's'placed axesspaced so that their cooperating surfaces are permanently at a distance exceeding the'diam eter of the fiber, at least one of said rollers shift-'-= able in a horizontal directionbetweenanopera tive position in which the distance-between'th'e; projections of the axes of said rollers onahorizontal plane is less than the sum of their'radii and an inoperative position in which the distance between the projectionsof the axes of said rollers on a horizontal plane exceeds the sum of-thei-r" radii; means tending to maintain said rollers in said inoperative position; an idleroller contacting the surface of one of saidcooperating rollers; a driving belt engagingsaid other 00- operating roller along a-portion of its axial length: and said idle roller; means for driving said-belt; and means for tensioning' said belt, whereby said: cooperating rollers will assume their operative position when said'belt is tensione'd'and theirinoperative "position when said belt is relaxed.

12. A device for drawing off artificial fibers from the spinneret, comprising at least two r0 tatably supported cooperating rollers having horizontally extending vertically displaced axes spaced so that their cooperating surfaces are permanently at a distance exceeding the diameter of the fiber, at least one of said rollers shiftable in a horizontal direction between an operativeposition in which the distance between the projections of the axes of said rollers on a horizontal plane is less than the sum of their radii and an inoperative position in which the distance between the projections of the axes of said rollers on a horizontal plane exceeds the sum of their radii; a shiftably supported tensionin roller; an idle roller contacting the surface of one of said cooperating rollers; a driving belt engaging said tensioning roller, said idle roller and the cooperating roller not contacting said idle roller; means for driving said belt; and means for shifting said tensioning roller.

13. A device for drawing off artificial fibers from the spinneret, comprising at least two rotatably supported cooperating rollers having horizontally extending vertically displaced axes spaced so that their cooperating surfaces are permanently at a distance exceeding the diameter of the fiber, at least one of said rollers shiftable in a horizontal direction between an operative position in which the distance between the projections of the axes of said rollers on a horizontal plane is less than the sum of their radii and an inoperative position in which the distance between the projections of the axes of said rollers on a horizontal plane exceeds the sum of their radii; a shiftably supported tensioning roller; an idle roller contacting the surface of one of said cooperating rollers; a driving belt engaging said tensioning roller, said idle roller and the cooperating roller not contacting said idle roller; means for driving said belt; a lever connected to said tensioning roller and adapted to control the shifting thereof.

14. A device for drawing off artificial fibers from the spinneret, comprising at least two rotatably supported cooperating rollers having horizontally extending vertically displaced axes spaced so that their cooperating surfaces are permanently at a distance exceeding the diameter of the fiber, at least one of said rollers shiftable in a horizontal direction between an operative position in which the distance between the projections of the axes of said rollers on a horizontal plane is less than the sum of their radii and an inoperative position in which the distance between the projections of the axes of said rollers on a horizontal plane exceeds the sum of their radii; means tending to maintain said rollers in said inoperative position; a shiftably supported tensioning roller; an idle roller contacting the surface of one of said cooperating rollers; a driving belt engaging said tensioning roller, said idle roller and the cooperating roller not contacting said idle roller; means for driving said belt; a lever connected to said tensioning roller and adapted to control the shifting thereof.

15. A device for drawing off artificial fibers from the spinneret, comprising at least two rotatably supported cooperating rollers having parallel axes relatively displaced in the direction of the extension of the artificial fiber, at least one of said rollers being shi-ftable; means for rotating said rollers in opposite direction; at least one roller having at least one rim preventing the cooperating surfaces of said rollers to approach closer than a distance exceeding the diameter of the fiber; means tending to maintain said rollers in said inoperative position; an idle roller contacting the surface of one of said cooperating rollers; a driving belt engaging said other cooperating roller along a portion of itsaxial length and said idle roller; means for driving said belt; and means for tensioning said belt whereby said cooperating rollers will assume their operative position when said belt is tensioned and their inoperative position when said belt is re-' laxed.

16. A device for drawing off artificial fibers from the spinneret, comprising at least two rotatably supported cooperating rollers having parallel axes relatively displaced in the direction of the extension of the artificial fiber, at least one of said rollers being shiftable; at least one of said rollers having at least one rim preventing the cooperating surfaces of said rollers to approach closer than a distance exceeding the diameter of the fiber; a shiftably supported tensioning roller; an idle roller contacting the surface of one of said cooperating rollers; a driving belt engaging said tensioning roller, said idle roller and the cooperating roller not contacting said idle roller; means for driving said belt; and means for shifting said tensioning roller.

17. A device for drawing off artificial fibers from the spinneret, comprising at least two rotatably supported cooperating rollers having parallel axes relatively displaced in the direction of the extension of the artificial fiber, at least one of said rollers being shiftable; at least one of said rollers having at least one rim preventing the cooperating surfaces of said rollers to approach closer than a distance exceeding the diameter of the fiber; means tending to maintain said rollers in non-contacting position; a shiftably supported tensioning roller; an idle roller contacting the surface of one of said cooperating rollers; a driving belt engaging said tensioning roller, said idle roller and the cooperating roller not contacting said idle roller;

means for driving said belt; a lever adapted to control the position of said shiftable tensioning roller.

JOSEF ZMATLiK. MIROSLAV STARY. BOHUMIL FILLER. JAN PINKAVA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,389,655 Wende Nov. 27, 1945 2,418,974 Henry Apr. 15, 1947 FOREIGN PATENTS Number Country Date 395,251 Great Britain July 13, 1933 

